Threaded inserts are fasteners that can be cast or installed to allow bolts or studs to be threaded into materials. Different types are suited for different applications, including mold inserts, captive nuts, self-tapping and press-fit inserts, and helical inserts for repairing damaged threads.
A threaded insert is a type of fastener component that can serve as an alternative to cutting threads into a material. These components can be cast or modeled in place when an object is created or installed after the fact. Some types of threaded inserts can be screwed or pressed into blind holes, while others consist of helical threads that need to be screwed into place with a special tool. Regardless of the particular design, each different type of threaded insert is intended to allow a stud or bolt to be threaded into.
There are many different types of threaded inserts, each of which may be better suited to certain applications and uses with particular materials. Some threaded inserts are designed to be incorporated into an object as it is created. One type of fastener that fits this description is the mold insert. These components are placed into molds before the plastic is injected so that the finished part contains metallic threads. A similar design is the captive nut, which is a type of threaded insert that is typically installed into materials that are too thin to otherwise support fasteners.
Other types of thread inserts can be installed into existing objects or used to repair damaged threads. Self tapping inserts and press fit inserts are two types of fastener components that are often installed after the fact. Both of these varieties require a hollow hole to be drilled in a piece before installation. In the case of the self-tapping insert, the component is designed to be screwed directly into a blind hole. It is also possible to fix this type of threaded insert with epoxy resin.
Press fit inserts are also designed to install directly into blind holes. Typically a hole is drilled that is approximately the same diameter as the insert, after which the fitting can be pressed in. This can often be accomplished with a hammer or clamp, although an arbor press may be required. Both press-in inserts and externally threaded inserts are commonly used in woodworking, although they can be used in other applications as well.
One type of threaded insert that is often used to repair damaged threads is the helical insert. These components consist of diamond-shaped wire wound in a helical pattern. Installation typically involves drilling out damaged threads, tapping the hole, and then screwing the coil insert into place. Because the wire is typically diamond-shaped in cross section, it will tend to bite into the threaded hole and provide a stronger grip than would otherwise be possible.
Protect your devices with Threat Protection by NordVPN
